The ProcessValueAMType of the Additive Manufacturing information model provides sensor monitoring information of an AM machine that are a direct and active part of the machining process. It is a subtype of the 8:ProcessValueType defined in OPC 40001-2, thus inheriting all InstanceDeclarations specified and is formally defined in Table 18.

Table 18 – ProcessValueAMType Definition

Attribute	Value
BrowseName	ProcessValueAMType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the 8:ProcessValueType defined in OPC 40001-2 i.e. inheriting the InstanceDeclarations of that Node.
0:HasProperty	Variable	Severity	SensorSeverity	0:PropertyType	O
0:HasProperty	Variable	Category	SensorCategory	0:PropertyType	M
Conformance Units
AdditiveManufacturing Monitoring - Process
AdditiveManufacturing Monitoring - Health

Severity indicates the criticality of the respective sensor data.

Category indicates the area of application of the respective sensor.

Warnings and errors created by these process values shall be indicated by 0:Events sent via the 5:Notification node of the AdditiveManufacturingType.

The 0:EngineeringUnits of the 0:AnalogSignal inherited from 8:ProcessValueType uses the 0:EUInformation to indicate the engineering unit of the process value represented. For the 0:EngineeringUnits only the recommendations according to 6.4 should be used.